Minerva printing press



5- M. A. SUAREZ I 2,011,736 4 MINERVA PRINTING PRESS 7 Filed ot. 10, 1953 4 Sheets-Sheet 1 1935- I M. A. SUAREZ I 2,011,736

MINERVA PRINTING PRES S Filed Oct. 10, 1953 4 Sheets-sheaf 2 Aug. 20, 1935. M A UAREZ 2,011,736

MINERVA PRINTING PRESS Filed Oct. 10, 1933 4 Sheets-Sheet 3 Aug. 20, 1935. su z 2,011,736

MINERVA PRINTING PRESS Filed Oct. 10, 1933 4 Sheets-Sheet 4 Patented Aug. 20, 1935;

as OFFICE NHNERVA PRINTING PRESS Manuel Alonso Suarez, Habana, Cuba Application October 10, 1933, Serial No. 693,012

In Cuba August26, 1933 r 4 Claims. I (Cl. 1j )1291) This invention relates to Minerva presses for printing sheet paper, and it has for its object the provisionof certain improvements in the construction of said presses to adapt them to work on a web which is successively unrolled from a roll, printed, longitudinally cut and rolled again. Said improvements particularly comprise a mechanism to cause the Web to advance v intermittently, a one-way drive clutching mechanism to engage or disengage said advancing mechanism, and means to control the length 01' the step by step advance of the Web.

Another object of the invention is to provide a means to normally hold the clutch in its clutch- 7: ing position andto disengage it when the print ing bed be placed in its inoperative position.

The invention is described with reference to the figures of the accompanying drawings, of

which:

Fig. l is a side elevation of the printing" press, seen from the side showing the driving mechanism. Fig. 2 is a front elevation of the same. Fig.3 is a side elevation of the machine, seen from the opposite side to that seen in Fig. 1.

' Fig. 4 is a fragmentaryside elevation similar to that of Fig. 1, showing a modified position of the intermittent advancing mechanism for the Web.

Fig. 5 is a front detail, showing the clutching mechanism to engage or ,disengagethe inter mittent advancing mechanism for the web.

Fig. 6 is an enlarged cross-section taken on line 66 of Fig.1. i

And Fig. 7 is a diagram showing the course of travel of the web through theprinting press.

, Inthe drawings, {and 2 are two side frames connected and spaced apart by cross-pieces and which support the operating mechanisms form ing a Minerva press for printing sheet paper, of treadle and driving shaft, which comprises a platen 4 mounted ons'the sideframes l and 2 of the press and which is designed to hold the sheets of paper to be printed, and a bed with impression screws 5 which is mounted on a frame 6 oscillatorily supported on a horizontal pivot shaft 1 mounted on a lower portion of the side frames l and 2, the movable frame 6 being provided with the usual inking, distributing and ink feeding devices whose detailed description is omitted here, as the same do not form a part of this inv vention.

- This invention aims certain improvements in said Minerva printing presses, with a viewto [adapt them .to operate on a, web. supplied to-themachine from a roll 9 and which is successivelyunrolled, printed, out and re-rolled by means of various mechanisms embodying the novelty of this invention,'the same also comprising means for transmitting motion from the frame 6 to the mechanisms 'for propelling, cutting and rolling the web.

The roll 9 is loosely mounted on a horizontal shaft ll! provided with two cones l0" longitudinally adjustable thereon to be adapted to different widths of the roll 9. The shaft Ill is rotatorily mountedin a slot I I laterally formed on an upright IZ- the'upper portion of which is suitably connected to the upper portion of the side frame 2 in the manner which will be explained hereinafter, and in a slot l3 laterally formed on a short upright l3, both uprights l2 and 13 being fixed on the same base 8.

Close to the shaft I0 is located a device to adjust the transversal position of the shaft, and which consists of a screw l4 rotatorily mounted in horizontal position on the upright l3 and on a bracket l5 integral with said upright l3, said screw l4 being provided with a head in the form of a grooved knob I6 for its manual operation. On said screw 14 is threadedly mounted the movable guide I! whose edge fitsin the groove of a grooved collar I8 integral with a second collar i9, both" collars I8 and I9 being fixed on the end of the shaft l6 and of which the second collar I9 is also grooved and carries a brake device provided with two arms adjustably connected by screw 2| furnished with a wing nut 22 which rests on one of the arms 20, the lower arm 20 resting on a-cur'ved arm 23 secured by screws to the side of the upright l3.

The web 24, upon being unrolled from the roll 9, is passedaround two guidingrollers 25 and. 26 mounted'at different heights on the side frames 1 and 2, which rollers guide the web first onwardly and then downwardly to go up again, in order to cause it to pass between two rubber rollers one, of plain surface 21 and another of corrugated or grooved surface 28, which rollers are designed to cause the web 24 to intermittently'advahce through the press. The two feed rollers 21 and 28 are mounted in such a manner that their contact line shall substantially remain beneath the lower edge of the platen-4 which in the press constituting the object of the present invention is made stationary by suitable means. i

\ The'plainroller 21 is of a larger diameter than the grooved roller 28 and the formerhas its journals rotatorily mounted through the side frames l and 2 andcarries at one end the non-sliding member-29gof a one-way drive clutch whose sliding member 39 is adapted to actuate only in one dii rection on the non-sliding member 29 and comprises a sleeve 3i slidably mounted on the reduced 28 on bearings 45 which are slidable invslots forme d'on guiding pieces ll oscillatorily mounted on the shaft 27 of the: roller 2'1, projecting from v the bearings iS atone side'threadedpins 48 each extreme" portion 21' of the shaft of said roller 21,

the sleeve '3I having on its middle portion a gear wheel 32 and on the other extreme portion of the sleevej3I there-is formeda groove 33 designed to receive two rollers 34 carried on the ends of the two branches of the oscillatory fork arm 35 piv otally mounted in 36 on a supporting bar S'lfix'ed to the side frame 2 and laterally projecting therefrom. The gearwheel 32 meshes with a rack 38' which slidably rests upon the base ,of a yoke 39 I oscillatorily mountedon the shaft 21" of the roller 21. The rack 38 is adjustable in its longitudinal position bymeans of a screw; 40 threadedly connected to the rear end of the rack and which is. connected by means of a pivotal connection at to.

another screw I32 threadedly connected to a sliding piece GS mounted ona guide 44 securedby screws to the frontrof, the lower portionof the movable frame 6, the object of this adjustable ar'-.

rangement being to control the run of the rack 38 which in both senses will operate in opposite directions the slidingjmemberof the clutch, while the latter will operate in only one directionthe plain roller 2?; through the'coupling of the two clutch members Hand 3% upon the rack. 38 moving back, as shown by arrows in Fig. 1 of the drawings,'thereby the 'Web2f4 being caused to ad vance intermittentlygby the pressure of the grooved roller 28 against the plain roller 27. The distance between the rolls 2! and 28 may beadjusted by mounting the shaft 28 of the roller of which pass across anopening in the rearhead ll. of each guiding piece 41 and'with which is engaged onits projecting end a :nut qlfij resting againstthe head 47' andby means of which is controlled the tension ofa coil spring 50 rolled on the pin 48 and which atoneiend rests against the side of each bearing and at the other end rests' against the head 41. I I c i The web 2a is gu ded as it. gets in and" out r c'ni thestationaryaplaten l respectively by two loose guiding 10116135 1 and ,52 rotatorily mounted at J the lower and: upper edges of the platen 4. s Higher abovethe web 24 passes'between the edges of two sets of cutting blades Stand 54 oppositely fixed on twohorizontal shafts 55 and 56 rota- -torilygmountedton two uprights 5] and581 raised on the side frames i and 2, the web M being' guide d m fco n .i a ut r m t s n mechanism by two small guiding rollers 59 and 6B rotatorily mounted on lugs 6 I and 62 projecting from the sides of theuprlghts 5'1 and 58 and; so arranged that they will hold in a substantially horizontal-position the portion of web 26 passing through the cutting mechanism.

.The bearings Stand 64 of the'bladeshaftsare slidably mountedin the uprights 5i and58 infsuch ,a manner that they can be removed from the top,

andl each of the upper bearings 3 can be pushed upwardly by means of a lever 65 pivotallymountr ed at'tii on one sidejof each upright and provided wltha pushing lug iii, the lever 65 resting at its,

free end on a supporting clamp 68, and each bearingfid is retainedinfposition by means ofa detent 69' of inverted U-shape which through a foot-69f j with which "itis provided-is rotatorily mounted" on a pin Ill vertically screwed on the upperpor- 'tion of each upright .51 and 58 and on which is rolled a coil spring II between the nut 12 and the foot 69?,it being sufficient to cause the detent 69 to be'rotated outwardly in order to free each upper bearing 64.v The longitudinal position of the shaft 56 can be fixed by means of a set screw 56 threadedly mounted across a bridge 64 secured to the upright 5 The web 24 is finally rolled, after cut, on a winding" roller 13 whose shaft is rotatorily mounted on bearings M supported on brackets which are integral with the side frames land 2', by connecting the, shaft of the roller 13, by means of a square head at the side of the press in which the upper upright I2 is located, with another shaft section 73" which passes through a threaded openingin said upright I2 by the interposition of a threadedsleeve I6 loose on said shaft and re-' ceived in said threaded opening, the threaded sleeve '76 ending exteriorly in aknob ll which is grooved on "its periphery so that the position of the roller I3 can be centered by hand'withrespect to the web 24, and the longitudinal position of the roller 73 may be adjusted by means of a set screw l8 passing through a threaded Opening v by means of the friction between the discs I24 and i25, it will serve as afbralse for the roller l3 and will prevent the web from breaking, The shaft section .73" has a fixed ratchet .wheel I25 engaged by a pawl. I21 pivotally mounted on thebearing M to avoid the backward motion of the roll I3 upon winding the web 2t. t

The diagram of Fig. '7 clearly shows the course of travel of the Web 2@ from the roll 9 from which it is unrolled, then passingaround the guiding rollers 25 and 26, and finally between the feed rollers, one plain 2'! and another grooved Zilwhich give theweb an intermittentdrawingmotion by meansofthe intermittent rotation of the roller 2'1, as above explained. The web then'passes' v over th e guiding roller 5i and is received on the stationary platen 4 arranged in a slanting posit;on, on which itreceives, the impression producedon the same by the impression form mountthe guiding'ro-ller 52 a nd'then passes to th'e cutting mechanism which canhave a variable num-.

bero f blades 53 and 5d, according to the number of strips in which the paper is sought to be cut which, aswill-be understood, depends o-nthe number of impressions effected-intransversal.direcition on the web 23, the paperb eing guided before and after being cut; by the guiding rollers 59 and flilsultably disposed to maintainfin a substantially horizontalposition-the portion of web passing across v the bladesifia and at, the web 24 being finally'wound on the roller lit-which can be easily detached from the pressby suitably operating the,

knob ll and removing the reduced end of the roller 73 from the holel'l lf of he 'oppositebearing it, as showninFig.2.p-

Themoti n is transmitted to the various mechanisms ofthe press, as follows: the motor shaft ,'IQ'rotatOrilymounted/on the side frames I and 2,"has"at one end a fixed pulley and a loose pulleyil I,and:at the other end itjis providedwith' ed on the movable bedfi. As the web 24 travels v out from the'stationary platen 4, it is guided by a ny whei a2. This than has fixed thereon a small gear wheel 83 which meshes with a larger wheel 84 also serving as a crank-wheel, the.

crank-bars 81 which are pivotally connected to the-oscillatory frame 88 carrying the inking rollers 89 and 90 destined to run on the bed 5 and on the ink distributing plate 9I supplied with ink by the fountain 02 whose construction details havebeen omitted as the same do not form a part of this invention, and it will only be stated that for producing said'motion, the oscillatory frame 7 88 is connected by means of a connecting bar 93 For thetransmission of motion to the drawings, cuttingand winding rollers for the web 24, the

following arrangement is made: the shaft 21 of the .plainroller 2? has secured at the side of the press on which the fly-wheel 82 is placed, a 1 sprocket wheel 95 which is connected by an endless chain 96 with another sprocket'wheel 9'Iof-a smaller diameter than the wheel 95 and fixed on a counter shaft 98 rotatorily. mounted on the upright I2, and said counter shaft 98 securely carries a sprocket wheel 99 of a larger diameter than the wheel 0? and which is also connected by means ofan endless chains I 08 to a sprocket wheel IIlI of a smaller diameter than the wheel The same sleeve 'IS'also has fixed a grooved pulley I02 which is rotatorily connected by an endless cord I03 with another grooved pulley I04 of a smaller diameter than the pulley I02 and secured toth'e lower shaft 55 of the cutting mechanism. In'this manner the motion of the motor shaft i9 is transmitted by the oscillatory motion of the frame'li to the winding roller I3 for the web 24 and from the roller I3 to the cutting mechanism 2 whoseopposite blades rotate by the friction of theblades 54 with the blades 53 at their contact edges. I

The plain rubber roller 21 is normally in intermittentzoperativeaction by the coupling in a sense of the rotation of the two clutch members 29 and forming respectively the nonsliding member and the sliding member of the clutch operated by the oscillatory arm 35, through the tension of a coil spring I05 connecting said arm to the side frame 2. In order to disengage the clutch when it is desired that the roller 21 may not rotate and that therefore the web 24 may not advance, a mechanism is arranged to maintain the clutch disengaged, and which mechanism is connected to the operating lever I08 of the Minerva press, which serves to place the movable frame 6 in an inoperative position, and which lever I06 is connected by means of a connecting bar III? with an arm I08 secured at the end of a counter shaft I09 rotatorily mounted on the side frames I and 2 of the press,.a sector piece I I0 being secured to the counter shaft I09, which is pivotally connected at II I with a bell-crank lever I I2 fixed on another counter shaft I I3 rotatorily mounted on the side frames I and 2 parallelly to the shaft I09, and which bell-crank lever is pivotally connected at its other arm with aconnecting bar H4 directly connected to the frame 88.

Such a mechanism to place the roller 21 in an inoperative position consists of a cord or wire l I5" whose end is secured by an eye-bolt H6 to the periphery of a collar H3 fixed on the counter shaft H3 at the end of said shaft corresponding to the side of the press on which the clutch for operating the roller 21 is mounted, and said cord or wire I I5 is thus in disposition to be rolled on or unrolled from the collar H3 upon the lever I06 beingoperated in one or another direction. Said wire or cord H5 is guided arounda small grooved pulley II! of vertical shaft rotatorily mounted'on a bracket H8 fixed to the side frame 2 and itextends on a same level outwardly the side frame 2, to be fastened to the end of a lever of equal arms I I9 pivotally mounted at I20 on the free end of the supporting bar 31, theopposed end of the lever I I9 being connected by means of a cable. I2I to an eye-bolt I22 fixed on the arm 35'at the opposite side of its point of connection with the coil spring I05, In this manner, when the lever I 05 be operated by placing it in the position indicated by dotted lines in Fig. 3 of the drawings, upon the counter shaft H3 rotating to placethe movable frame 6 in an inoperative position, the wire or cord I I5 will be wound .on the collar H3 and will draw, in the direction indicated by the arrow in Fig. 5, the arm of the lever H9 to which'it is connected, which will rotate on its pivot and at the opposite arm will draw the arm 35 outwardly by means of the cable I2I, causing it to rotate. on its pivot point 38, whereby the clutch will be disengaged by the separation of the two clutch members 29 and 30. On the contrary, when the lever I06 be caused to take the position indicated in full lines in Fig.

, 3 of the drawings, the counter shaft H3 will also rotate on a contrary direction than above and the cord or wire H5 will be unwound from the collar H3 and the arm 35 will return the clutch to its connecting position, in virtue of the resiliency of the coil spring I05.

It is obvious that the construction details of the advancing mechanisms for the web, as well as theposition of the same and of the cuttingmechanism, can be varied without altering the essential character of the invention, which is such as claimed hereinafter.

' What I claim is:

1. In a printing press of the class described, the combination with a stationary platen and an oscillating bed, controlled by an operating lever, of two feed rollers between which a web may pass in close contact before it reaches the stationary platen, means to cause the intermittent rotation of the feed rollers and including a oneway drive clutch associated with one of said feed rollers, said one way clutch being provided with a driving member slidably and rotatably mounted upon an axial extension on one of said feed rollers and adapted to engage a driven member of said clutch which is fixedly attached to said feed roller, a gear wheel carried on the slidable driving member of the one-way drive clutch, and a reciprocating rack engaging said gear wheel and pivotally connected to the oscillating bed frame and means connected to said operating lever to maintain the clutch disengaged when this lever is placed in an inoperative position.

2. In a printing press of the class described, the combination with a stationary platen and an oscillating bed controlled by an operating lever,

movesaid driving member out of engagement with said driven member, :a reciprocating rack bar meshing continuously with said: gear wheel; and pivotally connected to said oscillating, bed, and

. means connected to said bed'operating lever-for maintaining said oneway clutch in disengaged I, in close' contact before reachingthe stationary "platen, means to cause one of the -feed'rollers to rotate intermittently including a one-way drive clutoh' providedwitha slidable driving position when thebed is ininoperative position,

said means including a cable connectingsaid operating lever with said pivoted lever.

3.:In a printing pressflof thelclass described,

the combination with a stationary platen and an oscillating bedl controlled by an operating lever, of two feed rollers betw'een'which a web may pass member rotatably, secured on an axial extension of one of said feed rollers andfadapted to engage a driven member 'fixedly secured onsaid feed I rollen a gear Wheel carried on the slidable driving 9 member of theon'eway; drive clutch, a rack enaging said-gear wheel, ayokebeing 'oscillatorily mounted on the axial extension oflsaid feed roller, a, guiding piecefixedto the frame of the oscil-' lating bed near its pivot-alcent'er, a connecting piece mounted on'said' guiding piece and slidably adjusted thereon, a pivotal connection whose members are respectively screwed in said rack and in said connecting piece, and means comprising a collar on a counter-shaft forming part of an operating mechanism connected to said operating lever of the'press, afcable having one end connec'ted-to the periphery of saidcollar, the. other end of saidcable being connected to one end of a lever pivotedintermediate its ends, the other end of said lever being connected by a cable to a spring controlled arm provided for controlling the ,movement'of-said slidable driving member which is disengaged when the bed operating lever is placed in an inoperative position, 1 fl, In a printing press of the class described, thecombination with a stationary platen and an oscillating bed controlled bya manual operating lever, of twofeed rollers between which a web may passin close contact, before reaching the stationary platen, means to cause one of the feed rollers to rotate intermittently including a oneway driveclutch on a shaftofthe intermittently actuated roller, said clutch beingprovided-with a driving membervwhichis rotatably and slidably" mountedon said shaft and a driven; member fixed to saidgshaft, said driving member carrying a gear wheel,a rack engaging said'gear wheel,

a yoke-supporting said rack and forming a guide forit, said yoke being-oscillatorily mounted on the shaft provided, with said clutch, -,a guiding piecefixed to the frame of the oscillating bed,

- nearits pivotal center, a connecting piece mounted on said guiding piece and slidably adjustable thereon, a; pivotal connection whose members are respectivelyscrewed in a head onqsaidirack and in said connecting piece, slotted supporting pieces foscillatorily; mounted on the ends of the shaft of the roller provided with the clutch and on which are slidablvmountedthe.bearingsof the.

other feed roller, threaded pins projecting from said bearings and passing through ahead of, said supporting pieces, nuts screwed on the projectingends of saidscrews and which rest against the head of said supporting pieces, c'oil springson the pins projecting from, the bearings between these bearingsfiand the, heads of the supporting pieces to control the pressure of one feed roller against the other feed roller through the .Web passing between them, and means comprising a collar ona counter shaft forming partof an operating mechanism connectedsto said operating lever of thepress, a cable havingone end connected to the periphery of said collar,the other end'of said cable being connected to one end of a lever pivoted intermediate its ends, theother end of said lever being connected bya cable to a spring controlled arm providedj for controlling the movement of said slidable driving member which is disengaged when the bed operating lever is placed in an inoperative position;

I M. ,ALONSO SUAREZ. 

